<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>测试页面</title>
</head>
<body>
<h1>这是一个测试页面</h1>
<form action="/student/sign/in">
    用户名:<input type="text" name="username" placeholder="请输入用户名"><br><br>
    密&nbsp;&nbsp;码:<input type="password" name="password" placeholder="请输入密码"><br><br>
    <input type="submit" value="登录">
</form>

</body>
</html>